BTW, Hardly anyone at KONE in Moline knows much about MIPROM 21 anyway since Stu Burns Retired. May be better off calling CETEK in Moline. All the MIPROM people including software engineers went to CETEK. They may even have a PLC ready made you could purchase to do the job.
Phone # 563-386-4800

Montgomery used a unit called "Lonnie" to do the dispatching and Hall Calls.